Dump wagon



G. I. CLARK Get. 30, 1951 DUMP WAGON 4 Sheets-Sheet 1 Filed June 16, 1947 INVENTOP; Gare/d C/ar/z ATTORNEYS G. l. CLARK DUMP WAGON 4 Sheets-Sheet 2 Filed June 16, 194'? INVENTOR 66/29/0 C/ark BY.

ATTORNEY S G. I. CLARK Get. 30, 1951 DUMP WAGON Filed June 16. 1947 4 Sheets-Sheet 3 Q Q A ww N. mm M%.\ wm3 mm MN m m h nmn mvEN'rorz Gera/o CYan BY ATTORNEYS G. I. CLARK ct m, 11

DUMP WAGON 4 Sheets-Sheet 4 Filed June 16, 1947 'INVEN'TOR.

ATTORNEYS Patented Oct. 30, 1951 Gerald I. Clark, Santa Clara, Wooldridge Manufacturing vale, Calif., a corporation Calif., assignor to Company, Sunnyof Nevada Application June 16-, 1947, Serial No. 754,914 2 Claims. (01. 29s-27 This invention relates generally to the con struction of wagons adapted to carry and discharge relatively heavy loads of material such as earth, rock, or the like.

In large scale construction projects where earth or fill material is carried for a considerable distance and then discharged, it is customary to use heavy duty wagons equipped with pneumatic tired wheels and having means for dumping of the load where the material is desired. Wagons of this type must be capable of carrying rela tively heavy loads at high speeds, and it is desirable that the discharge operation be under such control as to permit spreading of the material as the vehicle moves forwardly.

It is a general object of the present invention to provide an improved vehicle or wagon of the above type, and which is provided with improved means for carrying out a controlled discharge operation.

A further object of the invention is to provide a Wagon of the above character having improved cable means for the discharge operation; and which will equalize forces with a minimum of cable wear.

Additional objects of the invention will appear from the following description in which the preferred embodiment of the invention has been set forth in detail in conjunction with the ace companying drawing.

Referring to the drawing:

Figures 1A and 1B when placed end to end, form a side elevational view of a wagon incorporating the present invention.

Figure 2 is a half end view of the wagon shown in Figures 1A and 1B.

Figure 3 is a half section taken along the line 3-4 of Figure 1A.

Figure 4 is a cross-sectional detail taken along. the line 4 l of Figure 1B.

Figure 5 is a cross-sectional detail taken along the line 55 of Figure 1B.

Figure 6 is a cross-sectional View taken along the line 6-6 of Figure 1B.

Figure 7 is a cable reeving diagram illustrating the manner in which the pull cable for carrying out a discharge operation is reeved over the various sheaves provided.

Figure 8 is a schematic side elevational view" illustrating the full discharge position of'tl'ie load carrying hopper.

The wagon constituting the present invention consists generally of a frame it in conjunction with a load receiving hoppenll; The frame is carried by forward-and rear sets of pneumatic tired wheels l2 and [3. The wheels l2 may be the driving wheels of a two wheeled tractor of the type disclosed and claimed in Patent No. 2,368,202. Such a tractor is coupled to the forward end of the main frame by the kingpin assembly Id. and is provided with suitable power steering means. The tractor is also provided with a winch unit l6, or what is commonly referred to as a power control unit. This unit consists of at least two cable reeving drums l7 and l 8, which are engaged by the cables for operation of the same; aswill be presently explained in detail.

Ingeneral it may be explained that the hopper II has an open bottom, and isnormally disposed over a latform provided by the main frame of the machine. To carry out a discharge operation the hopper II is moved rearwardly whereby the load is permitted to drop from the hopper at the rear end of the platform.

While the frame It may vary in detail construction, as illustrated it consists of a centrallongitudinally extending beam section 20 (Figures e and 5), the forward end of which is attaehed to the gooseneck beam extension 2|. The sides of the frame are formed by the parallel longitudinal box beams 22, which are attached by lateral extensions- 23 to the central longitudinal beam 20. Beams 22 fornirails for tracking the hopper as will be presently explained. The main portion of the frame is carried by the flat steel plate 2 4; which forms a platform'- underlying the hopper l-l. At the rear end of the machine a downwardly inclined plate 26 extends from the rear edge of plate 24',- to the bumper or pushing bolster 21.

The hopper II consistsof the inclined side walls- 28 together with the forward and rear end walls 29' and 31. These walls are suitably fabricatedfrom sheet metal having outer welded onreinforcing beams as illustrated. The lower edge the rear ends ofthe beams 33 (Figure 1B), and i the rollers or these assemblies are tracked upon' the beams 22. roller assemblyis illustratedin Figures Briefly each assembly consists of upper and lower rollers A- suitable construction for each bly (Figure 2) can consist of a roller 43 adapted to engage the under side of the adjacent beam 33, and a flanged roller 44 engaging the side of the beam 33, with its flange overlying the beam.

With the arrangement of tracking rollers described above it is apparent that the hopper H can be moved from the normal carrying position illustrated by solid lines in Figures 1A and IE, to a full rear discharge position illustrated diagrammatically in Figure 3. The tracking is such that the lower edge portion of the hopper is carried with a small clearance between the same and the platform, whereby the hopper moves relatively freely except for the engagement of the load with the platform.

A special cable system is employed for the purpose of moving the hopper between load carrying and discharge positions. Two operating cables 46 and 41 are employed (Figure 1B) and these cables are wound upon the two operating drums I! and I8. Cable 4! extends from its operating drum over the sheave 48, and from thence over a sheave 49 carried within a box 5|. The end of the cable is then anchored to the frame at 52. It will be evident that upon winding up cable 41 on one of the winch drums, the hopper is pulled forwardly relative to the frame.

Cable 46 passes over a sheave 53, and then over the sheaves 54 and 55 carried by the sheave boxes 56 and 51. From the sheave 55 it passes through a tube 58 extending through one of the brace members 36, and then engages a number of sheaves, part of which are carried by the frame and part by the hopper. Included in this arrangement are the sheaves 59 which are carried by the sheave mountings 6|. These mountings are attached to the rear ends of the main frame (Figure 1A) and adjacent the roller assemblies 42. Additional sheaves 62 are carried by sheave mountings 63, and are carried by the rear end portions of the beams 33 (Figure 1B), intermediate the forward end wall of the hopper and the forward ends of the brace members 35.

The cable 46 is reeved over these sheaves whereby when the cable is pulled by winding it upon its associated winch drum, equal forces are applied to the two sides of the hopper to move the hopper rearwardly to full discharge position. Thus from the sheave 55, which is located on one side of the machine, say the right hand side (looking forward), the cable extends rearwardly over the right hand rear sheave 59, and then forward and over one of the right hand sheaves 62. From this sheave the cable extends laterally of the machine to one of the left hand sheaves 62, and then rearwardly over the left hand rear sheave 59. From this sheave 59 the cable extends forwardly again to the other one of the left hand sheaves 62, and from thence to the other one of the right hand sheaves 52, and then to the rear of the machine, where it is anchored to the frame at 66.

Operation of my wagon is as follows: Normally the hopper I l is carried in the position illustrated in solid lines in Figures 1A and 1B, with the lower open end of the hopper well over the platform formed by plate 24. After the hopper has been loaded with material, as by means of a power shovel, it may be moved at relatively high speed applies power to to the location it is desired to discharge the load. The operator then commences to wind up the cable 46, whereby substantially equal forces are applied to the forward sheaves 62, to force the hopper rearwardly. As the rear end of the hopper moves away from the rear edge of the platform, the rear part of the load commences to discharge upon the ground over the inclined plate 26. Generally the machine is caused to advance forwardly, and at the same time the hopper is continuously moved rearwardly of the same to gradually discharge all of the load. By the time the hopper has reached the extreme rearmost position illustrated in Figure 8, all of the load has been discharged. The operator then releases the brake for the winch drum carrying cable 45 and the other drum to wind up cable 41. This serves to pull the hopper forwardly to its original normal position, while at the same time the cable 46 is spooled out to accommodate the forward hopper movement.

The cable 46 is disposed in such a manner relative to the hopper that it is protected at all times from falling rocks or the material to which it might be subjected, if in an exposed position. Likewise the manner in which the cable 46 is reeved enables application of substantially equal forces to the two sets of sheaves 62, and to the two forward corners of the hopper. Such equalization i obtained because the anchorage point 66 to the frame provides two pulling lengths of the cable on each side of the hopper, in spite of the fact that there are three lengths of cable on the right hand side as illustrated in Figure '7.

The manner in which the hopper is tracked, including particularly the arrangement and construction of the tracking rollers in conjunction with the rails 22 and 33, makes for a relatively rugged and durable construction, capable of operating over long periods of time with a minimum of servicing.

I claim:

1. In a dump wagon, a wheeled frame forming a load supporting platform and provided with parallel longitudinal side beams, an open bottomed hopper disposed normally above the platform, side beams attached to said hopper and extending parallel to and above said first named beams, roller assemblies attached to the forward end portions of said last named beams, and having tracking engagement with the said first named beams, roller assemblies attached to the rear end portion of the frame and having tracking engagement with the beam which are attached to the hopper, and power means for moving the hopper from load carrying to discharge positions comprising two sheave assemblies attached to the forward end portions of the beams which are attached tothe hopper, two additional sheave assemblies attached to the rear end portion of the frame adjacent the sides of the hopper, and a single pull cable extending from the front of the wagon and reeved serially through said sheave assemblies to apply substantially equal forces to the sides of the hopper to force the same rearwardly when the cable is pulled.

2. A wagon as in claim 1 in which the cable is reeved to provide an equal number of running lengths of the cable upon each side of the hopper, with the cable extending first from the forward end of the vehicle down one side of the hopper, and. with the dead end of the cable anchored on the same one side of the hopper and to the rear portion of the same.

GERALD I. CLARK.

REFERENCES CITED The following references are of record in the file of this patent:

Number 6 UNITED STATES PATENTS Name Date Madden Jan. 21, 1913 Gee Oct. 17, 1922 Shirrefi Sept. 23, 1924 LeTourneau Aug. 14, 1934 LeTourneau Mar. 9, 1943 

